Digital payment systems have transformed financial transactions in India by improving accessibility, efficiency, and transparency. The rapid growth of Unified Payments Interface (UPI), mobile wallets, and Aadhaar-enabled services has significantly expanded the reach of formal financial systems. This paper examines the role of digital payments in advancing financial inclusion and promoting sustainable economic development in India. Using secondary data from policy reports, government publications, and academic literature, the study analyzes the benefits, challenges, and future potential of digital financial systems. The findings indicate that digital payments enhance economic participation, reduce transaction costs, and strengthen the delivery of financial services. However, issues such as digital illiteracy, cybersecurity risks, and infrastructural gaps continue to hinder inclusive growth. The study concludes that with appropriate policy interventions, digital payments can serve as a key driver of an inclusive and sustainable economy.